Take one part Sim City, one part Rock Band, and one part music sequencer and you've pretty much got Isle of Tune, which was released today for the iPad. It's not quite a "game," but it's still totally cool enough to merit consideration for our Gaming App of the Day.
Isle of Tune looks like Sim City. You can lay down streets like it's Sim City. But once you start planting musical trees and chime-triggering houses, you'll realize this is actually a delightful music sequencer. Suburban sprawl as symphony?